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It is a long story - but lacking in many 'medical' details!
If there is a definite pointer or problem in Holter, you should take medicines. If the medicines don't work, they may go for ablation of abnormal nerve
pathways - there is a good chance of permanent cure. See a Cardiologist (Electro Physiologist).
won't lead to true loss of consciousness
. That is why, you need Neurological investigation - MRI
& MRA, EEG and so on will be necessary. See a Neurologist
can assess and make a positive diagnosis of Anxiety, if it is there.
It seems that there probably is more than one problem - but they appear to be diagnosable and treatable. Don't worry. More than one specialist might have to see you. It may a question of time and perseverance. And you will be well
Wishing speedy recovery